Pressure recording gauge



FA M. KANNENSTINE PRESSURE RECORDING GAUGE Dec. 22, 1931.

Filed Jan. 18 195o 5 Sheets-Sheet HHH IN ENTOR BY Pfg/Zak ATTORNEY DeC- 22, 1931- F. M. KANNENSTINE PRESSURE VRECORDING' GAUGE 3 Sheets-Sheet 2 Filed Jan. 18 1930 VENTOR ZM.

Bw ATTORNEYS Dec. 22, 1931. F. M. KANNENSTINE 1,837,222

PRESSURE RECORDING GAUGE Filed Jan. 18 1930 3 Sheets-Sheet 3 INVENTOR ATTORN EYS Patented Dec. 22, 1931 UNITED STATES PATENT oFFIcE FABIAN OF BLOOMFIELD, NEW JERSEY, ASSIGNOR TO GEOPHYSICAL RESEARCH CORPORATION, OF NEW YORK,VN. Y., A CORPORATION' 0F NEW JERSEY PRESSURE RECORDING GAUGE -Application led January 18, 1930. Serial No. 421,615.

This invention relates to pressure record-- d Fig. 11, and

ing gauges and has for an obj ect an improve pressure recording gauge, particularly adapted for use in determining4 pressures at different depths within bore holes extendmg into the earth.

A gauge embodying the invention comprises a metal tubing helix, one end of which is open to the atmosphere and the other end of which is sealed. Variationsvin pressure within the tubing effect twisting of the helix. One end of the helix is fixed and its other end is connected with a stylus, the position of which varies with the twisting of the helix. A properly lined strip of paper is caused to move past the stylus at a uniform speed so that there is recorded on the paper a chart of the pressures at different times. The gauge is enclosed in a protective casing so that 1t may be let down into a bore hole without danger of injury thereto. The instrument may be used to obtain a `record of pressures over definite periods at selected depths and this manner of use will depend upon the conditions under which it is used. Various ways of utilizing this instrument for recording pressures will be apparent to those skilled in the art.

Other objects, novel features and advantages of this invention will be apparent from the following specification and accompanyini` drawings, wherein: v

ig. 1 is a vertical section through a portion of an instrument embodying the invention;

Fig. 1 A is a like section of an'adjacent portion of the instrument; n

Fig. 1 B is a similar section of the remaining portion of the instrument;

Fig. 2 is an elevation of the clutch mechanism shown in Fig. 1.

the line 3 3, 4 4, 5 5, 6 6, 7 7, 8 8, and 9 9 respectively of Figs. 1, 1 A, and 1 B.

Fig. 10 is a perspective view of the instru ment with its protective casing removed Fig. 11 is a fragmentary vertical section through a modified form of instrument;

Fig.v12 is a section on the line 12-12 of Fig. 13 is a fragmentary section of a further modification of the invention.

The gauge is contained within a casing. 10 closed at one end by a rigidly attached cap 11 and at the opposite end by a plug 12 which constitutes a part of the gauge. A metal tube v 13 is attached to the plug 12 by bolts 14. The plug 12 is cut away as at 15 and in the rear wall of the recess thus formed there is provided an adjustable support 16 in which is mounted a bearing.L jewel 16a. The tube 13 is provided with an aperture 17 through which access may be had to the support 16. At the inner end of the plug 12 there is provided a projection 18 which is surrounded by one end of a helix 19 which is formed from flat tubing. One end ofthe tubing communicates with a channel 2O in the plug 12. A cap 21 is threaded on the plug 12 and coversthe open end of the channel 20, the cap being provided with a plurality of screens 22. Abar 23 is located in contact with the inner wall of the tube 13 .and is held by bolts 24. The bar 23 carries a bracket 25 at one end in which is provided an adjustable support 26 provided with a bearing jewel 26a. A shaft 27 is rotatably supported by the bearing jewels 16a and 26a.

A collar 28 is fixed to one end of the shaft 27 and is provided with a bracket 29 to which is fixed the inner end of the helix 19, the end of the tubing being sealed. A collar 30 is mounted on the shaft 27 and is held against rotation thereon by a set screw 31. This collar supports a resilient arm 32 having a stylus 33 at itsifree end.

A collar 34 is held in the tube 13 by bolts 35 and is provided with a bearing sleeve 36. A feed screw 37 has one en'd rotatably mounted in the sleeve 36 and has its other end Figs 3 to 9 inclusive are Sections taken onf received within a bore in the bracket 25. A

carriage 38 is supported within the tube 13 by rollers 39 arranged at the ends of the carviriage and engaging the inner wall of the tube. The carriage comprises a longitudinally slotted tubular member provided at one end with a head 40 in which is mounted a pin reciprocation of the former. The carriage is held against rotation by a roller 42 carried by clock mechanism 48. The clutch'member 45 is provided with a circle of teeth 45a and the clutch member 46 is provided with a short sector of teeth 46a which engage with the teeth 45a to cause the clutch members to rotate in unison.

A spring 49 presses the clutch member 46 into engagement with the clutch member 45 and the clutch member 46 is provided with a bayonet slot 50 into which'projects a pin 51 carried by the shaft 47. The pin and slot provide means for maintaining the clutch member 46 out of engagement with the clutch member 45. The tube 13 is cut away at two places adjacent the clutch members 45 and 46 to provide easy access thereto. The clock mechanism 48 is driven by a spring 48 contained with a cap 48b which extends beyond the tube 13 and is rotatable for the purpose of winding the spring.

r[he gauge is prepared for use by placing a piece of properlyA lined paper P in the carrier 36 with the latter in the position shown in Figs. 1, l-A and l-B, the stylus 33 being in contact with the lower edge of the paper and the clutch member 46 being disengaged from the clutch member 45. is then engaged with the clutch member 4 5 and the casing 10 is slipped over the tube 13 and screwed on to the plug 12. The feed screw 37 is rotated by the clock mechanism and the carriage 36 will move towards the plug 12 at a constantspeed, the bracket 25 being receivedwithin the slot in the carriage. The stylus 33 traces a line on the paper Pand is caused to move transversely to the direction of movement of the carriageby twisting movement of the helix 19. Twisting movement of the helix 19 is effected by variations in pressure and as the end of the helix is xed to the collar 28, corresponding rotation of the shaft 25 is effected, thereby causingmovement lof the stylus 33. The paper P is provided with cross lines to indicate elapsed time and withlongitudinal lines to indicate movement of the stylus from its zero position due to variations in pressure. The stylus may be set at any determined zero position with respect to the paper P by loosening the set screw 31 and rotating the collar 30 on the shaft 27.

The instrument may be lowered into the drill hole in which it is desired to determine the pressures. The pressure within the helix The clutch member 46 in a bore hole and a record of the pressure at that depth over a given length of time may be recorded or the instrument may be used to obtain a record of pressures at different depths in the bore hole.

The pressure at different depths is determinable by knowing the time at which the apparatus is started and the timesf'at which it is suspended at the various depths.

In the modification disclosed in Fig. 12, the carriage 38 is equipped with an involute support 33EL for the paper P, thus making it possible to use a wider sheet of paper than with the modification disclosed in 1, l-A and 1--B and to obtain a record of pressure va- .riations on a larger scale. In this modification, the shaft 27 extends into'the bracket 25 and carries the collar 30 to which is attached the resilient arm 32 which supports the stylus 33. The closed end of the helix 19 is attached In the modification disclosed in Fig. 13,

there is provided a multiple helix 19,com

posed of a plurality of concentric helices serially connected, preferably being made up from a single len h of tubing. In this moditication, the sha t 27 is mounted in the same manner as shown in Figs. 1, 1-A and l-B ,and the stylus 33 is attached to the shaft 27 in the same manner as shown in these gures. The multiple helix provides a greater length of tubing and makes the instrument more sen-` sitive by producing a greater change in the position of the stylus for like pressure'variations. The modication disclosed inFigs. 11, 12 and 13 may be combined to roduce an extremely sensitive instrument w ich will .make a largescale record.

It is of course understood that various modiications may be made in the device above. described, without in anyway departing from the spirit of the invention as defined 1n the appended claims.

I claim:

1. A device of the character prising a helix formed from tubing open at one end and closed at the other, means for described comrigidly supporting one end of said helix, a 1

stylus connected to the other end of said helix and movable therewith, a tubular car-- and means for moving said carriage axially of said helix at a constant speed, said styles being-arranged within said carriage to enprising a tube, a helix within said tube, said helix being formed of tubing open at one end and closed at the other, means for rigidlyl supporting the open end of said tubing, a stylus connected to the closed end of said tubing, a tubular carriage having provision for supporting a recording sheet in contact with its inner wall, and means for moving said carriage axially of said helix at a constant speed, said stylus being arranged within said carriage to engage said sheet.

4. A device of the character described comprising a helix formed of hollow tubing having one end -open and the other end closed,

- means for rigidly supporting the closed end ofsaid tubing, a shaft co-axial with said the open end off said helix,

suppcprt relative to said stylus at a constant s ee p7. A device of the character described comprising a plurality of connected co-axial helices formed of metal tubing vopen at one end and closed at the other end, means for rigidly supporting one end of said tubing, a stylus connected. to' the other end of sa1d tubin a carriage for supporting a sheet of recor ing paper, and means for moving said carriag relative to said stylus at a constant spee 8. A device of the character described comprising a plurality of connected co-axial helices formed of metal tubing open at one end and closed at the other end2 means 'for rigidly supporting one end of sald tubing, a.

stylus connected to the other end of said tub-v ing, a carriage having an involute portion for supporting a sheet of recording paper, and means for moving said carriage relatively to said stylus at a constant speed.

In testimony whereof, AI have signed my name to this speciication.

lFABIAN M.

helix, connections between the closed end of said tubing and said shaft, a stylus supported by said shaft, a tubular carrier having rovlsion for supporting a sheet of recor 'ng paper in contact with its inner wall, and neans for moving said carriage axially of said helix at a constant speed, said Stylus being arranged within said carrier to engage said aper.

5. .X device of the character described comprising a helix formed of hollow tubing havlng one end open and the other end closed,

' means for rigidly supportin the closed end of said tubing, a shaft co-axia with said helix, connections between the closed end of said tubin and said shaft, a stylus supported by said s aft, a tubular carrier havin provision for supportin a sheet of recor ing paper in contact wit its'inner wall, a lead screw co-axial with said helix, means'l for rotating said lead screw at a constant speed, and a follower supported by said carriage and projecting into the groove of said lead screw, said stylus being arranged within said carrier to engage said paper. A

6. A device of the character described comprising a helix formed of hollow tubing open at one end and closed at the other, meansfor rigidly supporting one end of said helix, a stylus connected to the other end of said helix, an involute support for a sheet of recording paper= and means for moving said 

